This is cool. A light that you power by raising a weight ballast. As the ballast slowly falls (over 20 min) it creates light. Designed for Africa. https://www.deciwatt.global/gravitylight
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This is cool. A light that you power by raising a weight ballast. As the ballast slowly falls (over 20 min) it creates light. Designed for Africa. https://www.deciwatt.global/gravitylight
